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2 Sheets-Sheet 1.

(No Model.)

J. W. VAN DYKE.

STEAM GENERATOR No. 290,503. Patented Dec. 18, 1883.

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J. W. VAN DYKE.

STEAM GENERATOR. v

No. 290,503. Patented 1390.18, 1883.

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Unrrnn STATES PATENT @rrrcn.

John W. van DYKE, or BROOKLYN, new roan.

STEAM-GENERATOR.

SFECIFICATIDN forming part of Letters Patent No, 290,502, daed December18, 1883,

Application filed December 14, 1882. No model.)

To all whom it may concern.-

Be it known that I, JOHN WV. VAN DYKE, of Brooklyn, in the county ofKings and State of New York, have invented certain Improvements inSteam-Generators, of which the following is a specification.

This invention relatesto that class of sectional boilers, so called, inwhich the tubesare placed zigzag in vertical or substantially verticalplanes with the said tubes, connected at their ends in such manner thatcirculation of water may-be effected from the lowermost to the uppermosttubes of each vertical series, or vice versa.

My said invention comprises certain novel means whereby the constructionof steam-generators of said class is greatly facilitated, and wherebythe expansion and contraction incident to changes of temperature in theboiler is prevented from interfering with the stability of the brickworkordinarily used in connection therewith.

Figure l is a vertical longitudinal sectional view of a steam-generatorconstructed according to my said invention. Fig.2 is a front view, andFig. 3 a rear view, of the same. Fig. l is a detail sectional View on alarger scale, showing one of the parts included in the w construction ofthe apparatus.

A are the tubes of the steamgenera-tor, which are placed in parallelseries, as represented in Figs. 2 and 3, each series being composed ofany desirednumber of the tubes placed one over another in theapproximately zigzag relative positions represented in Fig. 1. Thus, forexample, one end of the uppermost tube is closely adjacentio one end ofthe tube next below, whereas the opposite end of the latter is lowered,so as to be brought closely adjacent to the extremity of the tube nextbelow that, and so on to form the zigzag series composed of tubesalternately inclined in opposite directions, as represented in Fig. 1,as aforesaid. The closely-adjacent ends of the tubes of each series areconnected by what, for convenience, I term return-castings, (indicatedby the reference-letterB.) These castings, constructed and applied ashereinafter fully set forth,

' provide communication from the end of one tube to the next adjacentend of the next tube, and so on, as will be understood by reference tosaid Fig. 1. The. construction of the cast- I ings B is represented inthe detail view, Fig.

4. Each casting is made of cast-iron, of any suitable quality, andis ofsubstantially rectangular'form and hollow or box-like. At the inner sideof each casting are two circular holes or openings, a, designed toreceive the ends of tubes A, which are fastened therein by expanding bymeans of a suitable tool. In

-the outer or opposite side of the castings B are two hand-holes, b,which may be of any size suitable or convenient for the insertion andmanipulation of the expanding-tool used in attaching or connecting theends of the tubes A in the openings a, as hereinbefore set forth. Thehand-holes b are closed by plates 0, the bolts (1 of which work inconnection with crossbars or yokes c, placed across the openings 1), andresting on the edges thereof in a manner well understood in the art,except that the plate is placed outside and the yoke within. Eachcasting B has projecting from its outer side lugs f, through which areformed vertical slots a, the slots (4 of the one casting being in linewith the corresponding slots of the other castings above and below.

0 are the ordinary brick walls of a sectional boiler, which form inpractice the sides of the fire and smoke space, and which ext-end upwardsubstantially to the top of the boiler. Extending from one to the otherof these walls, at the front and rear of the boiler, are strong girdersor beams D, through which are passed vertical suspensory bars E,attached at their upper ends to the girders and extended down betweenthe lugs f of the castings B. Each of the suspensory bars E istransversely slotted at a point immediately beloweach of the lugsbetween which it passes, so that keys F, being driven through the saidslots, bear upward against the under side of the lugs f, and consequently sustain the return-castings and the attached ends of thetubes, the said parts being suspended from the girder or beam above. Thereturnbastings should be so pro p ortioned that those placed side byside, as indicated in Figs.2 and 3, will touch each other. When desired,they may be of such sizes and proportions that the upper surfaces ofonehorizontal set or system of the castings will be in contact with theunder surfaces of the set or system above; but, when desired, the saidcastings may be so proportioned as to leave a space between thehorizontal sets or systems aforesaid, which space may be filled in withbrick, as represented in Fig. 2.

t 'The castings B, in which terminate theforward ends of the uppermostof the tubes A, have fitted into them vertical tubes I, whichcommunicate with a drum, H, by means of the chamber 1, formed on orattached to the head of the drum, said drum being placed over thetubular portion of the generator, the said drum at its rearmost endcommunicating by a vertical tube, N, with amud-drum, K, which, in itsturn, communicates by short vertical tubes or passages h with castingsB, in which are inserted the rearmost ends of the lowest of the tubes A.

In the operation of the apparatus the water, heated by combustion in thefire-box L, and by the passage of the hot gaseous products of combustionthrough and between the tubes, in a manner similar or analogous to thatof the passage of hot products of combustion through the tubes in theordinary sectional boiler, passes upward to the lowermost of thetubes,thence through the lowermost of the return castings to the tube nextabove, and so on forward and backward until it passes into the drum,thence downward to the mud-drum, thence again into the lowermost of thetubes, and so on with a continuous circulation.

By means of the return castings B, constructed and combined with thetubes, as set forth, I am enabled to provide a sectional boiler capableof being very readily put together with out the necessity of handlinglarge castings or relatively heavy pieces of metal, and in which thetubes shall be affixed in place by expanding their ends into suitableholes or openings provided for that purpose in the castings, greatconvenience being at the same time provided for tightening the tubes inplace when they become loose, for affording access to the tubes to cleanthe same, and for other incidental repairs or attention, there being atthe same time such connection of the tubes that the water will circulatethrough all the tubes of the vertical series, and be thereby exposed tothe heat for a relatively great period of time, so that steam is mosteffectually generated therein, and thence transmitted with the volume ofwater to the drum at the top of the apparatus. Furthermore, bysuspending i each of the return-castings separately from a truss or beamoverhead, each of the said castings and tubes connected therewith isenabled avoided. It is to be understood that the suspension of thesections, as aforesaid, may, when desired, be continued or extended, soas to include the suspension of the mud-drum, this alternative being amere matter of judgment or opinion on the part of the builder.

WVhat I claimas my invention isl. The combination of the girders orbeams D, castings suitably constructed to provide return-passages to thetubes, vertical rods E, hanging from said girders and extending downparallel withand outside of said castings, and forming a support for thesame, and tubes arranged in series, each series composed of tubesalternately inclined in opposite directions, the whole constructed,combined, and arranged for joint use and operation substantially as andfor the purpose herein set forth.

2; In asteam-generator, the combination of the castings B, constructedto receive the adjacent ends of the upper series of tubes, A,

and also the adjacent ends of the vertical pipes 1, and having thehand-holes b, with the return-castings B, series of oppositely-inclinedtubes A, the series of vertical pipes I, drum H, having chamber I,adapted to receive said pipes I, and the independent pipe N, extendeddownward from said drum and communicating with the series of tubes A atthe lower part thereof, all substantially as and for the purpose hereinset forth.

3. The combination, in a steam-generator, of the girder D, a series ofpipes connected together by castings B, and a series of rods hangingfrom said girder, passing down parallel with and outside of saidcastings, and forming a support for the same, substantially asdescribed.

41. The combination of the girders or beams D, vertical .suspensory rodsE, keys F, castings 13, having lugs f, and the tubes A, arranged inseries, each series composed of tubes alternately inclined in oppositedirections, the whole constructed, combined, and arranged for joint useand operation substantially as and for the purpose set forth.

JOHN WV. VAN DYKE.

Witnesses THOMAS E. CROSSMAN, RUDOLF H. BJELLMAN.

